[Story] Session credential header for multiple targets per request

[andrewazores]

          I'll save the idea of providing multiple session credentials for a single request for a followup, if there is enough time this release cycle. This at least puts things back to working how they used to and should make session credentials work as expected on all (or at least most?) of the web-client views. Any view that isn't doing GraphQL requests across multiple targets that open connections per query, basically.

Originally posted by @andrewazores in https://github.com/cryostatio/cryostat/issues/1388#issuecomment-1464502732